Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
van tien » toan tien, van hieu, van tuan
sach ty » sach y, sach tu, xach tay
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
hanh bi » hanh vi, thanh bai, khanh bui
va cam » va cham, va cac, va cao
cam tu » cam thu, nam tu, dam tu
bi van » bui van, vi van, bi va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) or (sach thu)) xang xa hoi. hieu va cam tu va hanh bi van tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thu)) xang xa hoi. hieu va cam tu va hanh bi van tien*.